Ray-Ban Wayfarer glasses with initials engraved

I lost my Ray-Ban Wayfarer glasses yesterday around 3pm outside the Boston Public Library on Copley Square. They are matte black with gold-tone hinges, model RB2140, prescription lenses, and the right lens has a tiny scratch I didn't notice at first. On the inside of the left temple is my initials 'J.S.' which should help identify them. I was in a hurry coming from a meeting near the Copley Station entrance, and I fear I might have left them in the library yard or in front of the fountain. They are my only pair for reading and work; I really need them back.